FERGUS (GRAYBURG UP)
Field #30664666 · District 9 · --
Leases
11
Operators
3
Cum Oil
0 BBL
Cum Gas
364k MCF
Cum Cond
125 BBL
Production
1993-01 — 2026-07
Production History Production data is a work in progress — still being validated against RRC filings. Spot something off or have questions? [email protected]
RRC production reported through Apr 2026 · recent months incomplete
Type Curve (normalized avg across leases)
Click Load to compute type curve from lease data
Top Operators
| OPERATOR | LEASES | OIL (BBL) | LAST |
|---|---|---|---|
| VANCO OIL & GAS CORP. | 11 | 0 | 2019-06 |
Lease Types
Leases (11)
| TYPE | LEASE | OPERATOR | OIL (BBL) | GAS (MCF) | FIRST | LAST |
|---|---|---|---|---|---|---|
| Gas | HALFF "64-E" | VANCO OIL & GAS CORP. | 0 | 474 | 1993-01 | 1993-07 |
| Gas | CHALMERS-HALFF | VANCO OIL & GAS CORP. | 0 | 15k | 1993-01 | 1999-06 |
| Gas | HALFF "65" W | VANCO OIL & GAS CORP. | 0 | 15k | 1993-01 | 2002-09 |
| Gas | HALFF "65E" | VANCO OIL & GAS CORP. | 0 | 44k | 1993-01 | 2004-05 |
| Gas | HALFF "64-W" | VANCO OIL & GAS CORP. | 0 | 505 | 1993-01 | 1993-06 |
| Gas | HALFF "63-E" | VANCO OIL & GAS CORP. | 0 | 78k | 1993-01 | 2008-06 |
| Gas | HALFF "67" | VANCO OIL & GAS CORP. | 0 | 14k | 1993-01 | 2011-03 |
| Gas | HALFF, BUSS | VANCO OIL & GAS CORP. | 0 | 167k | 1993-01 | 2019-06 |
| Gas | HALFF "62" | VANCO OIL & GAS CORP. | 0 | 793 | 1993-01 | 1995-03 |
| Gas | HALFF-NOELKE UNIT | VANCO OIL & GAS CORP. | 0 | 11k | 1993-01 | 2003-04 |
| Gas | PROCTOR HARDING HALFF | VANCO OIL & GAS CORP. | 0 | 18k | 1993-01 | 2000-04 |